Konversi bilangan desimal ke bilangan romawi menggunakan NetBeans

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package romawi;

import java.util.*;

public class Main {

public static void main (String args[])

{

int bil;

String tampil="";

//inisialisasi berupa array

String [] biasa = {"","I","II", "III", "IV", "V",

               "VI", "VII", "VIII", "IX"};

String [] sepuluh = {"", "X", "XX","XXX","XL"};

String [] limapuluh = {"", "L", "LX", "LXX", "LXXX","XC"};

String [] seratus =  {"", "C", "CC", "CCC", "CD"};

String [] limaratus = {"", "D", "DC", "DCC", "DCCC", "CM"};

String [] seribu =   {"", "M", "MM", "MMM", "Mv", "v"};

// inputan dari keyboard

System.out.print("Masukkan bilangan desimal :  ");

Scanner obj = new Scanner(System.in);

bil = obj.nextInt();

//kondisi dimana angka tdk lebih dari 5000

if (bil>5000)

{

  System.out.println("Maaf.., Angka Desimal Yang Di "+

  "Inputkan Harus Di Bawah 5000");

}

else

{

  //defenisi

  int lmrts = bil % 1000;

  int srts = lmrts % 500;

  int lmpl = srts % 100;

  int spl = lmpl % 50;

  int ak = spl % 10;

  int a = bil/1000;

  tampil += ""+seribu[a];

  //aturan konversi desimal ke romawi

  if ( (lmrts >=900) && (lmrts <= 999))

  {

    tampil += "CM";

    //90

    if( (lmpl >= 90) && (lmpl <= 99) )

    {

      tampil += "XC";

      int f= ak/1;

      tampil += ""+biasa[f];

    }

    else

    {

      int d = lmpl/50;

      tampil += ""+limapuluh[d];

      int e = spl/10;

      tampil += ""+sepuluh[e];

      int f= ak/1;

      tampil += ""+biasa[f];

     }

    }

    else

    {

      int b = lmrts/500;

      tampil += ""+limaratus[b];

      //400

      if ( (srts >= 400)&& (srts <= 499) )

      {

        tampil += "CD";

        //90

        if( (lmpl >= 90) && (lmpl <= 99) )

        {

          tampil += "XC";

          int f= ak/1;

          tampil += ""+biasa[f];

        }

        else

        {

          int d = lmpl/50;

          tampil += ""+limapuluh[d];

          int e = spl/10;

          tampil += ""+sepuluh[e];

          int f= ak/1;

          tampil += ""+biasa[f];

        }

      }

      else

      {

         int c = srts/100;

         tampil += ""+seratus[c];

         if((lmpl >= 90)&&(lmpl <= 99))

         {

           tampil += "XC";

           int f= ak/1;

           tampil += ""+biasa[f];

         }

         else

         {

           int d = lmpl/50;

           tampil += ""+limapuluh[d];

           int e = spl/10;

           tampil += ""+sepuluh[e];

           int f= ak/1;

           tampil += ""+biasa[f];

         }

     }

 }

 System.out.println("Maka angka Romawinya " + bil+ " : " + tampil );

}

}

}